Answer:
Area_shaded
= 340.9 cm^2
Explanation:
Find the area of the circle, then subtract the area of the triangle.
The 25cm side of the triangle is a hypotenuse of the right triangle. It is also the diameter of the circle.
The radius of the circle is 1/2 the diameter. So the radius is 1/2•25, or 12.5cm
We need the radius to find the area of the circle.
Area_circle
= pi•r^2
= pi•12.5^2
= 490.9 cm^2
The two legs of the triangle can serve as our base and height to find the area of the triangle.
Area_triangle
= 1/2b•h
= 1/2(20)(15)
= 150 cm^2
Subtract.
490.9 - 150
= 340.9cm^2
The area of the shaded region is 340.9cm^2.